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Published on: February 12, 2021
The Effect of COVID-19 on Adult Cardiac Surgery in the United States in 717 103 Patients
Tom C Nguyen1, Vinod H Thourani2, Alexander P Nissen3
1Department of Surgery, Division of Cardiothoracic Surgery, University of California San Francisco, San Francisco, California.
Insights
The COVID-19 pandemic caused a significant drop in adult cardiac surgeries nationwide, especially elective procedures. Mortality rates for some surgeries increased, and surgical volumes did not fully recover post-surge.
Area of Science:
- Cardiology
- Public Health
- Health Services Research
Background:
- The COVID-19 pandemic has had a profound global impact, with the United States experiencing a high mortality rate.
- Limited data exists on the effects of COVID-19 on adult cardiac surgery trends and outcomes nationally and regionally.
Purpose of the Study:
- To analyze the impact of COVID-19 on adult cardiac surgery volume, trends, and outcomes.
- To assess national and regional variations in surgical case reduction and mortality during the pandemic.
Main Methods:
- Utilized the Society of Thoracic Surgeons Adult Cardiac Surgery Database (2018-2020) and the Johns Hopkins COVID-19 database (2020-2021).
- Analyzed surgical and COVID-19 volumes, trends, and outcomes on national and regional levels.
- Employed observed-to-expected ratios to evaluate risk-adjustable mortality.
Main Results:
- Analyzed 717,103 adult cardiac surgery patients and over 20 million COVID-19 patients.
- Observed a 52.7% national reduction in adult cardiac surgery volume, with a 65.5% decrease in elective cases.
- The Mid-Atlantic and New England regions experienced significant reductions (up to 80% for elective cases) and a 1.48-fold increase in observed-to-expected mortality for isolated coronary bypass surgery during the initial surge.
- Nationwide cardiac surgery volumes did not return to pre-pandemic baseline levels.
Conclusions:
- The COVID-19 pandemic led to a dramatic decrease in adult cardiac surgery volume.
- The Mid-Atlantic and New England regions were disproportionately affected during the initial COVID-19 surge.
- A concurrent rise in observed-to-expected 30-day mortality was noted alongside the reduction in surgical procedures.
Background:
COVID-19 has changed the world as we know it, and the United States continues to accumulate the largest number of COVID-related deaths worldwide. There exists a paucity of data regarding the effect of COVID-19 on adult cardiac surgery trends and outcomes on regional and national levels.
Methods:
The Society of Thoracic Surgeons Adult Cardiac Surgery Database was queried from January 1, 2018, to June 30, 2020. The Johns Hopkins COVID-19 database was queried from February 1, 2020, to January 1, 2021. Surgical and COVID-19 volumes, trends, and outcomes were analyzed on a national and regional level. Observed-to-expected ratios were used to analyze risk-adjustable mortality.
Results:
The study analyzed 717 103 adult cardiac surgery patients and more than 20 million COVID-19 patients. Nationally, there was a 52.7% reduction in adult cardiac surgery volume and a 65.5% reduction in elective cases. The Mid-Atlantic region was most affected by the first COVID-19 surge, with 69.7% reduction in overall case volume and 80.0% reduction in elective cases. In the Mid-Atlantic and New England regions, the observed-to-expected mortality for isolated coronary bypass increased as much as 1.48 times (148% increase) pre-COVID rates. After the first COVID-19 surge, nationwide cardiac surgical case volumes did not return to baseline, indicating a COVID-19-associated deficit of cardiac surgery patients.
Conclusions:
This large analysis of COVID-19-related impact on adult cardiac surgery volume, trends, and outcomes found that during the pandemic, cardiac surgery volume suffered dramatically, particularly in the Mid-Atlantic and New England regions during the first COVID-19 surge, with a concurrent increase in observed-to-expected 30-day mortality.
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